Stop-motion for sewing and looping machines



(N0 Mdel.) W. an H. PAULMANN.

STOP MOTION POR SEWING AND LOOPING MACHINES.

Patented Deo. 17, 1889.

UNITED STATES PATENT GEEICE.

VILLTAM PAULB'IANN AND HENRY PAULHANN, OF GLASTONBRY,

CONNECTICUT.

STOP-MOTION FOR SEWING AND LOOPING MACHINES.

SPECIFICATION forming part of Letters Patent No."417,333, dated December17, 1889.

Application filed October 3, 1888. Serial No. 287,069. (No model.)

To all whom it may concern: u

Be it known that we, WILLIAM PAULnAN-N and HENRY PAULMANN, citizens ofthe United States, and residents of Glastonbury, in the county ofHartford and State of Connecticut, have invented certain new and usefulImprovements in Stop-Motions for Sewing and Looping Machines, of whichthe following is a full, clear, and exact description, whereby any oneskilled in the art can'make and use the same.

Our invention consists in the combination of the frame, the movablehead, the beltshifter rod, and a stop-motion device. It further consistsin the combination, in a machine of this class, ot the movable headbearing a trip device, a stop-rod with a projection in the path ofmovement ot the trip, and a tilting lever that is connected to thestopfrod and to the shifter-bar; and it fiirther consists in the detailsof the several parts of the device making up our improvement, and intheir combination, as more particularly hereinafter described, andpointed outin the claims. y

Referring to the drawings, 'Figure l is a view in rear elevation of asewing-machine with our improvement attached. Fig. 2 is a detail View,in rear elevation, on an. enlarged scale, illustrating` the operationofour device. Fig. 3 is a detail side viewof the trip-fingerborne on thesewing-machine head. Fig. et is a detail top view of the adjustabletrip-tingen In the accompanying drawings, the letter a denotes the bedof aseaming-machine such as is shown and described in United Statespatent to E. E. Kilbourn, dated November 20, 1866, No. 59,746, thismachine having a movable head l), carrying the thread and part of thesewing and looping mechanism, the said head being driven by means ot thethreaded shaft c, that extends from end to end across the bed, and isdriven, as by means of a belt (il, passing around the pulley d. Inthe-ordinary method of using this machine the movement of the head l),that is driven by the screw-shaft c, is stopped by means of ashipper-rod e, that extends along the machine above the shaft in aposition where it may be conveniently reached by the operator from anypoint along the length of the machine.

This shi pper-rod is supported in bearings ff, and has at one end ashoulder g, that abuts against the bearing f when thebelt is running onthe fast. pulley. The machine is stopped by lifting up on theshipper-rod, when the spring 7L at once moves it lengthwise and throwsthe belt cl upon the loose pulley and stops the machine.

Owing to inattention or carelessness or the effort to attend to too manymachines at once, an operator may allow the sewing-machine head totravel too far along the screwshaft before stopping it, and this resultsin the breaking of the needles or such bending of the same as causespoor work to be done on the succeeding scam that is attempted to besewed by the machine. In order to obviate these` difliculties, we havecombined therewith an automatic trip device t', and this consists ot alever k, pivoted to ablock l, tast to the frame or any fixed part of themachine, the upper arm 7o of the lever underlying the under side of theshipper-rod e and resting in contact therewith. i The longer arm k2 ofthe lever is connected toi the stop-rod m, as by passing through a slotin the end of the stoprod that is supported on uprights n, fast to theframe of the machine. To this reciprocating stop-rod lm, there issecured one or 'more studs o, adj ustably secured thereto, as by meansof a screw-clamp o', and these studs project into the line of movementot' the adjustable trip-finger p, that is borne 4on the traveling headl) ofthe sewing-machine. This trip-finger is secured in such position tothe head that when it is set as illustrated in dot ted outline in Fig. 2ot' .the drawings it will in the forward movement of the sewing-machinehead come in contact with the stud o and slide the stop-rod along, whichsliding movement tilts the lever 7.1, and thus lifts the shipper-rod, sothat t-he shoulder is raised above the stop on the bearing f and thespring h at once throws the shipper-rod over and shifts the belt to stopthe machine. This trip-finger is made vertically adjust-able by meansofthe cam-latch 0', that, .in the form of improvement shown, is slottedat the end for the passage of the finger that is held downward by meansof the spring p. When the cam-latch is set as shown in Fig. 3, the trip-IOO finger will not operate to move the stop-rodgl l. In combinationwith the movable head but by moving` the Cain-latch. forward thelbearing` the trip-finger, the sliding,` shipper- 'Iinger is projecteddownward a distance su f- Iicient to cause its lower end to engage thestud in the movement of the head.

IVe do notliinit ourselves to the particular construction or arrangementof-the trip-lever or of the trip device, and it is obvious that one ormore of the adjustable studs may be used, as may be desired.

In the operation of our device, as soon as the machine-head has beenreturned to the end of the maehine to start upon a seam the resetting ofthe shoulder of the shipper-rod in engagement with the bearing tilts thestop-lcver and sets the stop device in proper position to operate assoon as the machine again is at work, and this sliding oi theshipper-rod throws the belt from the loose 1o Ithe fast pulley andstarts the 1nachine.

IVe claim as our inventionrod, the tilting trip-lever with one arm incontact with the shipper-rod and the other arm inv contaet with thesliding stop-rod, and the projecting stud on the stop-rod located in thepath of Vmovement of the trip-finger, all substantially as described.

2. In combination with the movable head of the sewing-machine, thesliding shipperrod, the vertiealy-adjustable trip-nger secured to saidhead, the tilting` lever with one arm in engagement with the shipper-rodand the other in engagement with the sliding` stop-rod, and the slidingstop-rod bearing the adjustable stud, all substantially as described.

L WILLIAM PAULMANN.

HENRY PAULMANN. Witnesses:

COOPER S. RoBEsoN, CHAs. N. LooMEs.

